Throttle valve



Sept. 16, 1930. w. F. KIESEL, JR 1,775,961

THROTTLE VALVE Filed Jan. 18, 1928 2 Sheets-Sheet 1 aza 91M attozmqgPatented Sept. 16, 1930 ATES' FFEE WILLIAIVI F. KIESEL, J33, ALTOOITA,PENNSYLVANIA THROTTLE VALVE Application filed January 18, 1928. SerialNo. 247,714.

This invention relates to throttle valves and more particularly tothrottle valves adapted for use on steam locomotives and similardevices.

The various features of novelty and objects of the present invention maybe enumerated as follows:

A. The provision of a throttle valve housing which forms the soleclosure for one end of a steam drum which may be on the exterior of theboiler barrel.

B. The arrangement of the throttle valve on the exterior ofthe boilerbarrel, the superheater on the interior of the smoke-box and theprovision of a conduit or dry pipe passing through the wall of thesmoke-box and connecting the two parts.

C. The arrangement of the throttle valve entirely outside of the boiler.

D. The provision of a casing within the valve housing having connectionwith the outlet conduits and of means to provide balancing steam to thebottom of said casing from near the top of said housing.

E. The manner of operating the valve without resorting to packing orsliding operating rods.

In more or less conventional locomotives it has been customary to locatethe throttle valve Within the boiler barrel, in a suitable steam dome,and to lead the dry pipe from the valve to the cylinders through thefront flue sheet and thus into the smoke-box. The present inventionobviates a number of the well-known difuculties experienced with thatform of construction. It is particularly suitable for use with that typeof locomotive boiler disclosed in my co-pending application SerialNo.202,521, filed June 30, 1927.

The invention may be understood best after a consideration of theaccompanying drawings and following specification, wherein is discloseda single exemplary embodiment thereof, with the understanding, however,that such changes may be made therein as fall within the scope of theappended claims, without departing from the spirit of the invention.

' In said drawings:

Figure l is a side elevation of a locomotive having a throttle valveconstructed accord ing to the present invention applied thereto, certainparts being omitted for the sake of simplicity Figure 2 is alongitudinal vertical section through the throttle valve housing;

igure 3 is a transverse section through the valve housing taken on line33 of Fig. 2; and

Figure 4 is a partial horizontal sect-ion taken on line -l-& of Fig. 2.

Referring particularly to Fig. 1, the locomotive will be seen to includethe boiler barrel 10, extending from the fire-box 11 to the smoke-box12, which is just forward of the front flue sheet 13. Lying above andsubstantially parallel to the boiler barrel is the outside steam drum 14in the form of a cylinder of small diameter having communication withthe interior of the boiler barrel by means of the fitting 15. The rearend of the steam drum extends over the fire-box and is closed by asuitable fitting 16. The front end extends up to near the front fluesheet and is cut off substantially square as at 17. This steam drumtakes the place of the customary steam dome and insures dry steam forthe power cylinders.

lVithin the smoke-box are a pair of superheaters 18, one for eachcylinder 19 of the locomotive and connected to the steam chest thereofas at 20. The supcrheaters, of which but one is visible, are connectedtogether by the cross-balance header 21.

The inlet header 22 of each snperheater OX- tends upwardly and through asuitable aperture in the wall of the smoke-hex and is provided with acoupling flange 23 on the end thereof. The means for sealing the openingthrough the smoke-box wall, while yet allowing relative movement of theheader 22 due to expansion and contraction resulting from temperaturechanges, is disclosed in my co-pending application $erial No. 205,019,filed July 11, 1927.

Steam from the drum 14: is introduced into the headers 22 through theconduit sections 241- which are connected to the drum through the agencyof the throttle valve housing Referring now to Figs. 2, 3 and l, it w llbe seen that the housing is preferably a one-piece casting having theneck or sleeve 26 adapted to fit tightly Within the end of: the drum 14and .be' secured therein by suit able fastening means such as the rivetsshown. It thus forms the sole closingmeans ifor the' torward endotthestearn drum.

the interior ofwhich is connectedto t-he'conduit sections 24 by thelaterally disposed integral conduits 30 which pass through the Walls ofthe housing as shownin Fig S, The flow ofsteain lntotne cas1ng,- andhence -to the superheaters, is controlled bythevalve 31 seating 111 theopen upper "end of there-asing 28. The ClSlllg and the valveareconstructed'"according to the disclosure in'rny.

-Patent No; '1,275,041,"Throttle valve, issued August 6311918., and neednot be further described here except to state that "the valve is of thebalanced typeto reduce the'ainount of'efhirt necessary to inovethesaine, Steam to 'efieet the balancing 1s admitted to thegun'derside'of the piston 32 directlyconnected tothevalve 3 1, and istamens d by the" secondry as possible torlthis purpo'seis taken rfroinfnearfthe top 'of'the' valve housing by dfary valve'SB onthe niainvalve stem 84.

Steam for balancing" purposes should he as ineenfs of the. conduit 35:cast; integral With reaches to "the'levelofthe nain valve;

. Inf ordertojoperate the valve stein; which; s gu ded for verticalmovement, '3 bell crank; ism-sorted to, one arm-310i h chf s Within thehousing and the other arrrifidoiiwhieli is outside ofthehousing; Theinner. flllln" is bifurleatedasht 39'to stinddle the valve stern 34 andhas each 'arm longitudinally slotted to engagej w th the cross-p1ns-4Oon theggco'l lar 41 secured tojtheupiier end of the valve stein-"f it IThe}; inner; arm of the bell "crank iscon nefiied totheioutei armby'nieans of thetore sionshaft' 42 wh ch 15 arrangedin theoil'setchamber-T43 in the Ffrontw'all of thefvalve housing". This shat-thee itshearings in the 'thiinble 44 pressedin the bessj 45 and 'in'the bushing.46 epessing e ough the Wall 47 of I the housi'n' and b olted-thereto 'b"means of {the flange 48. The shaft is ma de-steani-tight wherei't'passes through the bushing byineans of theplano-jconvex Washer 49.Steainypres sure on theflange 50' on theshaft pres'seslthis flangefzigainst the Washer, and the asher 7 agein'stla' seat at'the'innerendof the bushing- 46f PoWen to operate'the valve is applied through thepulli'rod 51 pivoted to thelower I' sfjof extreme nnportanc e" thatprovision I housing is attached to the boiler by the large 1 port isillustratedin Figures 2 and-3 ivhere 7 relative" movement ban take placebetween theparts, thus insuring that thereiwlll-be no strains on thedruin' or the throttle valve is claimed asnew "nd" 7 outside of said"boiler, and; indirectly -.*eo'ncation with" means on "said ClOSll'barrel, agsteain druin surmoentinjg said bar housing forfsa'idvalvel"closi'ng the nd'ot in: loeoniotive construetion for j ex-l'pansion andcontrztct o oi the parts subject 5 to"temperature changes.The locomotive'illustrated in Figure 1 is intended'forjuse withsteampressures as high as 450 pounds to-the J square inch, and it willbe seen that the temperature range is thus very great. The drum 14 whichtakes the placeof the eus j tolnary steam donie andsupplies-jsubstantial: 1y dry saturated steam to the throttle valvefitting 15' near the r'earfend-o f the boiler bar,- i rel and near thecenter of the drum." The vvhole ii'orwardend of the drum 14 is unattached to the'boilerbarrel;andit is arrangedito havethis end' aswell asthe throttlevalve housing supportedonly by a-sl d-ingsupport 9" whichrestson the boil-erbarrel, ljTlllS SjLlP thecastin'g 25'i'or1ning'thehiousing for-the f throttle valve has arranged-thereon the in-itegragl feet 52Which extenjd be'lovv the'bottoni of the casting andareadaht'ed 'tdrestdn the boiler barrel to carry the load ofthethrIOtt-le f, I valve and of the {forwardv end offthe drumTheymerely' rest on the boiler barrelsotha't housing other thanthoseimposednorinalr steam pressures. Q If 1 1 Froin the ebovedescript'ion 1bwill be seen; "e5 that the various teatiires-an'd.-obj'ects of the; Vinvention are efiec'ti'vely embodied in *the' a y I I v a t novelconstruction and arrangement. and alongtheouts de.Of'theeasmg-QS itHaving thus "described the invention, hat A i desired *b'e ecured byLettersfPatent-Jis' V t t v 1. in-eioctmonve havingebe r ,a'sin lie boxand'a sup'erheeteriwithinsaid sinokeeh the cornbinationxot thriOtt-levalv'eefntirel nected thereto to. control the flew otsteein jtherefrom,and a 'con'duit connectlng the exit erberrel; a, steanrdrumjoutside o f;"substan 9 jtieQllypara-Ilel to and; in oomniunicetion-With- I I 'saidcbarrehe closure "for andthitside oft-hes Itomva-rdendf of said drum; prising a housing for the rel, a throttleivelveilat oneendol?saiddrurn, 7

said dru n' said housing'ha ingftivo oppositely disposed steam outlet 5Iii-a lo-coinet ve i-ncenih n tion; a boiler barrel, a smoke-box, asteam drum surmounting said barrel, a throttle valve at one end of saiddrum, a housing for said Valve clos in the end of said drum, saidhousing having two oppositely disposed steam outlets, and a conduitsecured to each outlet and pass-' ing into said smoke-box.

6. In a locomotive, in combination, a boiler having an external steamdrum, a throttle valve housing closing one end of said drum, a valve insaid housing, balance means below said valve adapted toreceive steamfrom beneath and means in said housing to supply balance steam theretofrom near the top of said housing.

7. In a locomotive, in combination, a boiler barrel, a smoke-box at thefront end thereof, a superheater in said smoke-box, a steam drum outsideof said barrel but in communication therewith, a throttle valve on theend of'said steam drum and close to the junction of said barrel andsmokebox, and a conduit from said valve to said superheater, passingthrough the wallof said smoke-box. 8. In a locomotive, in combination, aboiler barrel, a smoke-box at the front end thereof, a cylinder adjacentsaid smoke-box, a horizontal steam drum outside of and substantiallyparallel to said boiler barrel, a throttle valve housing closing theforward end of said drum, and a conduit from said housing to saidcylinder, said conduit passing through said smokebox.

9. A housing for a locomotive throttle valve, comprising a unitarycasting including a sleeve adapted to be secured to a steam drum, ahollowing body portion coextensive with said sleeve, a leg to supportsaid housing and drum from the locomotive boiler, a steam conduitextending from said hollow body portion, and integral means to cooperatewith the valve proper and the said conduit.

10. In a locomotive, in combination, a boiler, a saturated steam drumextending longitudinally over said boiler, a throttle valve having ahousing including a body portion, a sleeve extending from said bodyportion and attached to said drum, conduits extending laterally fromsaid housing,'and a valve member in said housing to control the flow ofsteam from said drum to said conduits.

In testimony whereof I hereunto ailix my signature. 7

WILLIAM F. KIESEL, JR.

